Despite her fab figure only four months after giving birth to son Ace Knute, who joined big sister Maxwell Drew, 18 months, Simpson recently made it clear she does not plan to obsess about her weight for the sake of her daughter.

"Raising Maxwell makes me realize that I don't want her to see me beat myself up for things like food choices or numbers on a scale," she recently wrote on her Parents.com blog. "Those things don't determine who we are and instead make us feel terrible about ourselves … I want her to know her value, rather than spending her energy fighting negative voices from within."